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not sure the weight but tube chassis with a cr 500 motor look at the kickstart coming out the side
I honestly don't think any thing would be gained by dropping the sled weight. Everything that has been considered doesn't make it perform any better.
This is how I am looking at it (note im am using these numbers hypothetically):
160hp sled that weighs 500lbs has the same power to weight ratio as 80hp sled that weighs 250lbs.........so now u really don't gain anything. In my mind a one cylinder machine isn't going to do the trick.
These next figures are off of TracksUSA's website:
15x121x2 challenger track gives u a surface area of 1815 sq.in. and weighs in at 45 lbs, thus giving u .0247931 lbs/sq.in.
15x151x2 challenger track gives u a surface area of 2265 sq.in. and weighs in at 54lbs, thus givin u a .023841 lbs/sq.in.
What I conclude here is that just because u have less hp and can use a shorter track doesn't mean u have greater flotation....u would still be better off with a longer track.
Its almost like comparing apples to oranges. If u want a light weight sled that has a short track I think one would be better comparing a sled in that category and finding a way to make it lighter without comprimising performance. Same goes for a sled with a long track.
Just my thoughts....got a lot going thru my head how it may or may not be beneficial.
383lb800's sled.
Tell our forum what you have found out about that skid please? Where's the rest of that Hawk now?
Everybody has something to contribute.
As I remember, the original Phazers was around 50 HP stock. I recall Yamaha offered a piston kit that boosted it to 56 for racing. I'd think a pipe would put it around 60. I don't think 90 is possible for a trail ridden motor. But, I think fan cooling has a lot going for it since it is inherently lighter.
Doesn't seem like there is much interest in considering a fan motor for a super lightweight sled. I think that is unfortunate. In my view, one way to obtain a super light sled is to make it minimalist. I'm thinking a 300lb 3/4 size sled with real suspension is totally doable without using any exotic materials.
Actually, I wonder how light the new fan cooled XP could be made if it was stripped of all non essential parts? The 550 might save 20 lbs over the 600 liquid motor including its cooling system?
The lightest possible XP chassis sled I am pretty sure will be using carbon fiber from C3
http://www.c3powersports.com/store/...ath=74&zenid=f6c0386b382d5d776ba31a19155decce
Their max weight loss they gave at Hay Days was about 50 lbs. This was with carbon chassis with integrated gas tank (molded into top of tunnel) and their coolers and full carbon body panels. This is $8000 and change Canadian.
When you go in this far, Floats all the way around (maybe 4 - 8 lbs) and Alternative Impact TI front A-arms for (7 lbs) and his TI front arm in the skid is amazing light. Lose the oil injection for 10 lbs. Straightline Performance NEW carbon silencer only weighs about 2.5 lbs and is quiet. Sub 350 lbs would be easy with a 600 and I haven't figured the flotation on that weight for quite a while but if a 16 X 121 X 2 is available could lose even more weight and still guessing have flotation of stock 16 X 146.
Good Luck